[1] Osped Moriggia Pelascini, Neurosurg Unit, Gravedona E Uniti, Italy
[2] Cantonal Hosp, Dept Neurosurg, St Gallen, Switzerland
[3] Cantonal Hosp, Spine Ctr Eastern Switzerland, St Gallen, Switzerland
[4] Reg Hosp Lugano, Dept Neurosurg, Neuroctr Southern Switzerland, Ente Ospedaliero Cantonale, Lugano, Switzerland
[5] Univ Cattolica Sacro Cuore, A Gemelli Univ Hosp Fdn IRCCS, Dept Neurosurg, Rome, Italy
[6] Univ Med & Pharm Iuliu Hatieganu, Cluj Cty Emergency Hosp, Dept Neurosurg, Cluj Napoca, Romania
[7] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[8] Karolinska Univ Hosp, Dept Neurosurg, Stockholm, Sweden
[9] Rigshosp, Dept Neurosurg, Copenhagen, Denmark
[10] Med Univ Innsbruck, Dept Neurosurg, Innsbruck, Austria
[11] Ctr Hosp Lisboa Norte CHLN, Neurosurg Dept, Lisbon, Portugal
[12] Salfort Royal NHS Fdn Trust, Manchester, England
[13] Burdenko Neurosurg Ctr, Dept Spinal & Peripheral Nerve Surg, Dept Int Affairs, Moscow, Russia
[14] Mil Med Acad, Clin Neurosurg, Belgrade, Serbia
[15] ASST Osped Niguarda, Dept Neurosurg, Milan, Italy
[16] Univ Med Ctr Hamburg Eppendorf, Dept Neurosurg, Hamburg, Germany
[17] Univ Hosp Muenster, Dept Neurosurg, Munster, Germany
[18] Acibadem Cityclin Univ Hosp Tokuda, Dept Neurosurg, Sofia, Bulgaria
[19] Mayo Clin, Dept Neurol Surg, Rochester, MN USA
[20] Mayo Clin, Dept Neurosurg, Rhoton Neurosurg & Otolaryngol Surg Anat Program, Rochester, MN USA
[21] Mayo Clin, Dept Otolaryngol Head & Neck Surg, Rhoton Neurosurg & Otolaryngol Surg Anat Program, Rochester, MN USA
[22] Univ Palermo, Dept Biomed Neurosci & Adv Diagnost BiND, Neurosurg Unit, Palermo, Italy
[23] Univ Messina, BIOMORF Dept, Div Neurosurg, Messina, Italy
[24] Hosp Univ La Paz, Dept Neurosurg, Madrid, Spain